Aviation English
Aircraft Systems

What is outflow valve?

outflow valve A valve that regulates the discharge of air from the pressurized cabin to maintain desired cabin pressure.

Source: ICAO Doc 9432, FAA PCG

How is “outflow valve” Used in Practice?

Cabin, the outflow valve is stuck open, unable to maintain pressurization, request technical support.

Certification Exam Relevance

ICAO Level 4ICAO Level 5ICAO Level 6EASA FCL.055

Who Needs to Know This Term?

  • Pilots
  • Air Traffic Controllers
  • Cabin Crew

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Frequently Asked Questions

What is outflow valve?

A valve that regulates the discharge of air from the pressurized cabin to maintain desired cabin pressure.

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